Question

6. A solar cell generatesa
potential difference of 0.10 V when a 400 resistor
isconnected across it, and a potential difference of 0.15 V when
a1000
resistor issubstituted.

(a) What is the internal resistance of the
solarcell?
(b) What is the emf of the solar cell?
V
(c) The area of the cell is 8.0cm2, and the rate per
unit area at which it receivesenergy from light is 2.0
mW/cm2. What is the efficiencyof the cell for converting
the light energy to thermal energy inthe 1000
externalresistor?
%